A haunted ship is sailing along the coast of Rocky Beach. Justus, Peter and Bob can hardly believe their eyes as a three-master with torn sails glides through the mist. Ghostly illusion or reality? The three detectives need nerves of steel as their investigations lead them to bloodthirsty pirates from the distant past. Has an old curse brought them into the present? There is only one way to solve this mystery: the three detectives from Rocky Beach must board the pirate ship.